Nothing in the basket.
The HD 400U delivers the natural, expressive sound Sennheiser is known for through an uncompressed USB C connection. Simple, pure, and deeply human. Lightweight comfort, effortless control, and a durable battery-free design complete the experience.
The HD 400U delivers the natural, expressive sound Sennheiser is known for through an uncompressed USB C connection. Simple, pure, and deeply human. Lightweight comfort, effortless control, and a durable battery-free design complete the experience.
General data
| Ear coupling | Over-ear |
| Transducer principle | Dynamic |
| Acoustic principle | Closed |
| Plug | USB C |
| Cable length | 1.4 m |
| Weight (headphone) | 217 g |
Headphones
| Frequency response | 18 – 20,000 Hz (-10 dB) |
| Impedance | 18 Ω |
| Sound pressure level (SPL) | 120 dB SPL @ 1 kHz, 1V RMS |
| Total harmonic distortion (THD) | <0.5% (1 kHz, 100 dB SPL) |
Microphone
| Frequency response | 100 – 10,000 Hz |
| Pick-up pattern | Omni-directional |
| Sound pressure level (SPL) | -44 dbV/Pa |